SH 55
{
STIHL BG 55, 65, 85, SH 55, 85
WARNING
Read and follow all safety
precautions in Instruction Manual –
improper use can cause serious or
fatal injury.
ADVERTENCIA
Lea y siga todas las precauciones
de seguridad dadas en el manual
de instrucciones – el uso incorrecto
puede causar lesiones graves o
mortales.
Instruction Manual
Manual de instrucciones
Instruction Manual
1 - 35
Manual de instrucciones
36 - 72
Original Instruction ManualPrinted on chlorine-free paper
Printing inks contain vegetable oils, paper can be recycled.
© ANDREAS STIHL AG & Co. KG, 2012
0458-295-8621-A. VA1.K12.
0000000008_005_GB
BG 55, BG 65, BG 85, SH 55, SH 85
English
1
{
This instruction manual is protected by copyright. All rights reserved, especially the rights to reproduce, translate and process
with electronic systems.
Contents
Allow only persons who fully understand
this manual to operate your blower.
To receive maximum performance and
satisfaction from your STIHL blower, it is
important that you read, understand and
follow the safety precautions and the
operating and maintenance instructions
in chapter "Safety Precautions and
Working Techniques" before using your
blower. For further information you can
go to www.stihlusa.com.
Contact your STIHL dealer or the STIHL
distributor for your area if you do not
understand any of the instructions in this
manual.
WARNING
Because a blower is a high-speed tool,
some special safety precautions must
be observed as with any other power
tool to reduce the risk of personal injury.
Careless or improper use may cause
serious or even fatal injury.
Guide to Using this Manual 2
Safety Precautions and Working
Techniques 2
Using the Unit 10
Working Technique 11
Assembling the Blower 11
Assembling the Vacuum Shredder 12
Fuel 14
Fueling 15
Starting / Stopping the Engine 16
Cleaning the Air Filter 18
Engine Management 18
Adjusting the Carburetor 19
Catalytic Converter 21
Spark Plug 21
Engine Running Behavior 22
Rewind Starter 22
Storing the Machine 23
Inspections and Maintenance by
Dealer 23
Maintenance and Care 24
Main Parts 25
Specifications 28
Special Accessories 29
Maintenance and Repairs 29
Disposal 30
STIHL Incorporated Federal
Emission Control Warranty
Statement 30
STIHL Incorporated California
Exhaust and Evaporative
Emissions Control Warranty
Statement 32
Trademarks 34
BG 55, BG 65, BG 85, SH 55, SH 85
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Pictograms
The meanings of the pictograms
attached to or embossed on the
machine are explained in this manual.
Depending on the model concerned, the
following pictograms may be on your
machine.
Symbols in Text
Many operating and safety instructions
are supported by illustrations.
The individual steps or procedures
described in the manual may be marked
in different ways:
N A bullet marks a step or procedure.
A description of a step or procedure that
refers directly to an illustration may
contain item numbers that appear in the
illustration. Example:
N Loosen the screw (1).
N Lever (2) ...
In addition to the operating instructions,
this manual may contain paragraphs
that require your special attention. Such
paragraphs are marked with the
symbols and signal words described
below:
DANGER
Indicates an imminent risk of severe or
fatal injury.
WARNING
Indicates a hazardous situation which, if
not avoided, could result in severe or
fatal injury.
NOTICE
Indicates a risk of property damage,
including damage to the machine or its
individual components.
Engineering Improvements
STIHL’s philosophy is to continually
improve all of its products. As a result,
engineering changes and improvements
are made from time to time. Therefore,
some changes, modifications and
improvements may not be covered in
this manual. If the operating
characteristics or the appearance of
your machine differs from those
described in this manual, please contact
your STIHL dealer for assistance.
Have your STIHL dealer show you how
to operate your power tool. Observe all
applicable local safety regulations,
standards and ordinances.
WARNING
Do not lend or rent your power tool
without the instruction manual. Be sure
that anyone using it understands the
information contained in this manual.
WARNING
Use your blower only for clearing leaves,
twigs, grass, clippings, paper, debris,
and dust in yards, gardens, sport
stadiums, parks, paths, streets,
driveways and parking lots and for
similar tasks.
Guide to Using this Manual
Fuel tank for gasoline
and engine oil mixture
Press to operate manual
fuel pump
Safety Precautions and
Working Techniques
Because the use of any
blower may be danger
-
ous, special safety
precautions must be
observed to reduce the
risk of personal injury.
It is important that you
read, fully understand
and observe the following
safety precautions and
warnings. Read the
instruction manual and
the safety precautions
periodically. Careless or
improper use may cause
serious or fatal injury.
BG 55, BG 65, BG 85, SH 55, SH 85
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3
Do not use it for other purposes, since
misuse may result in personal injury or
property damage, including damage to
the machine.
WARNING
Minors should never be allowed to use
this power tool. Bystanders, especially
children, and animals should not be
allowed in the area where it is in use.
WARNING
To reduce the risk of injury to bystanders
and damage to property, never let your
power tool run unattended. When it is
not in use (e.g. during a work break),
shut it off and make sure that
unauthorized persons do not use it.
Most of these safety precautions and
warnings apply to the use of all STIHL
blowers. Different models may have
different parts and controls. See the
appropriate section of your instruction
manual for a description of the controls
and the function of the parts of your
model.
Safe use of a blower involves
1. the operator
2. the power tool
3. the use of the power tool
THE OPERATOR
Physical Condition
You must be in good physical condition
and mental health and not under the
influence of any substance (drugs,
alcohol, etc.) which might impair vision,
dexterity or judgment. Do not operate
this machine when you are fatigued.
WARNING
Be alert – if you get tired, take a break.
Tiredness may result in loss of control.
Working with any power tool can be
strenuous. If you have any condition that
might be aggravated by strenuous work,
check with your doctor before operating
this machine.
WARNING
Prolonged use of a power tool (or other
machines) exposing the operator to
vibrations may produce whitefinger
disease (Raynaud's phenomenon) or
carpal tunnel syndrome.
These conditions reduce the hand's
ability to feel and regulate temperature,
produce numbness and burning
sensations and may cause nerve and
circulation damage and tissue necrosis.
WARNING
This STIHL blower is not equipped with
an anti-vibration ("AV") system. Other
STIHL blower models are available with
AV system designed to reduce the
transmission of vibrations created by the
machine to the operator's hands. An AV
system is recommended for those
persons using power tools on a regular
or sustained basis.
All factors which contribute to
whitefinger disease are not known, but
cold weather, smoking and diseases or
physical conditions that affect blood
vessels and blood transport, as well as
high vibration levels and long periods of
exposure to vibration are mentioned as
factors in the development of whitefinger
disease. In order to reduce the risk of
whitefinger disease and carpal tunnel
syndrome, please note the following:
– Keep your hands warm.
– A power tool with loose components
will tend to have higher vibration
levels.
– Maintain a firm grip at all times, but
do not squeeze the handles with
constant, excessive pressure. Take
frequent breaks.
All the above-mentioned precautions do
not guarantee that you will not sustain
whitefinger disease or carpal tunnel
syndrome. Therefore, continual and
regular users should closely monitor the
condition of their hands and fingers. If
any of the above symptoms appear,
seek medical advice immediately.
WARNING
The ignition system of the STIHL unit
produces an electromagnetic field of a
very low intensity. This field may
interfere with some pacemakers. To
reduce the risk of serious or fatal injury,
persons with a pacemaker should
consult their physician and the
pacemaker manufacturer before
operating this tool.
Proper Clothing
WARNING
To reduce the risk of injury, the operator
should wear proper protective apparel.
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4
WARNING
Be particularly alert and cautious when
wearing hearing protection because
your ability to hear warnings (shouts,
alarms, etc.) is restricted.
THE POWER TOOL
For illustrations and definitions of the
power tool parts see the chapter on
"Main Parts."
WARNING
Never modify this power tool in any way.
Only attachments supplied by STIHL or
expressly approved by STIHL for use
with the specific STIHL blower model
are authorized. Although certain
unauthorized attachments are useable
with STIHL power tools, their use may,
in fact, be extremely dangerous.
If this tool is subjected to unusually high
loads for which it was not designed (e.g.
heavy impact or a fall), always check
that it is in good condition before
continuing work. Check in particular that
the fuel system is tight (no leaks) and
that the controls and safety devices are
working properly. Do not continue
operating this machine if it is damaged.
In case of doubt, have it checked by your
STIHL servicing dealer.
WARNING
Small particles (e.g. dust) blown through
the blower tube and nozzle can cause a
static charging of the blower tube. This is
especially true in low humidity and high
dust conditions. In order to reduce the
risk of shock from static charging and
subsequent injury from loss of control,
your blower has features designed to
help reduce the build up of static
electricity in the blower tube and
equalize the charge with the engine and
/ or operator.
The control handle is designed to
conduct static electricity through the
throttle cable to the engine and from the
handle through the operator to the
ground.
THE USE OF THE POWER TOOL
Transporting the Power Tool
WARNING
When transporting your power tool in a
vehicle, properly secure it to prevent
turnover, fuel spillage and damage to
the unit.
Fuel
Your STIHL power tool uses an oil-
gasoline mixture for fuel (see the
chapter on "Fuel" of your instruction
manual).
To reduce the risk of
injury to your eyes never
operate your power tool
unless wearing goggles
or properly fitted protec
-
tive glasses with
adequate top and side
protection complying with
ANSI Z 87.1 (or your
applicable national
standard).
Power tool noise may
damage your hearing.
Wear sound barriers (ear
plugs or ear mufflers) to
protect your hearing.
Continual and regular
users should have their
hearing checked
regularly.
Clothing must be sturdy
and snug-fitting, but allow
complete freedom of
movement.
Avoid loose-fitting jack
-
ets, scarfs, neckties,
jewelry, flared or cuffed
pants, unconfined long
hair or anything that
could become drawn into
the air intake. Secure hair
so it is above shoulder
level.
Good footing is very
important. Do not wear
sandals or go barefoot.
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5
WARNING
Fueling Instructions
WARNING
Fuel your power tool in well-ventilated
areas, outdoors. Always shut off the
engine and allow it to cool before
refueling. Gasoline vapor pressure may
build up inside the fuel tank depending
on the fuel used, the weather conditions
and the tank venting system.
In order to reduce the risk of burns and
other personal injury from escaping gas
vapor and fumes, remove the fuel filler
cap on your power tool carefully so as to
allow any pressure build-up in the tank
to release slowly. Never remove the fuel
filler cap while the engine is running.
Select bare ground for fueling and move
at least 10 feet (3 m) from the fueling
spot before starting the engine. Wipe off
any spilled fuel before starting your
machine.
WARNING
WARNING
Before Starting
WARNING
Always check your power tool for proper
condition and operation before starting,
particularly the throttle trigger, throttle
trigger lockout and stop switch. The
throttle trigger must move freely. Never
attempt to modify the controls or safety
devices.
WARNING
Never operate your power tool if it is
damaged, improperly adjusted or
maintained, or not completely or
securely assembled.
To reduce the risk of injury, do not
operate your blower unless it has a
properly mounted blower tube.
WARNING
Check that the spark plug boot is
securely mounted on the spark plug – a
loose boot may cause arcing that could
ignite combustible fumes and cause a
fire.
WARNING
Keep the handles clean and dry at all
times; it is particularly important to keep
them free of moisture, pitch, oil, fuel mix,
grease or resin in order for you to
maintain a firm grip and properly control
your power tool.
Starting
WARNING
Start the engine at least 10 feet (3 m)
from the fueling spot, outdoors only.
WARNING
Your power tool is a one-person
machine. Do not allow other persons in
the general work area, even when
starting.
For specific starting instructions, see the
appropriate section of your manual.
Place the power tool on firm ground or
Gasoline is an extremely
flammable fuel. If spilled
and ignited by a spark or
other ignition source, it
can cause fire and seri
-
ous burn injury or
property damage. Use
extreme caution when
handling gasoline or fuel
mix. Do not smoke or
bring any fire or flame
near the fuel or the power
tool. Note that combusti
-
ble fuel vapor may
escape from the fuel
system.
Check for fuel leakage
while refueling and during
operation. If fuel leakage
is found, do not start or
run the engine until the
leak is fixed and any
spilled fuel has been
wiped away. Take care
not to get fuel on your
clothing. If this happens,
change your clothing
immediately.
Unit vibrations can cause
an improperly tightened
fuel filler cap to loosen or
come off and spill quanti
-
ties of fuel. In order to
reduce the risk of fuel
spillage and fire, tighten
the fuel filler cap by hand
as securely as possible.
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6
other solid surface in an open area.
Maintain good balance and secure
footing.
WARNING
To reduce the risk of injury from loss of
control, do not attempt to "drop start"
your power tool.
WARNING
When you pull the starter grip, do not
wrap the starter rope around your hand.
Do not let the grip snap back, but guide
the starter rope to rewind it properly.
Failure to follow this procedure may
result in injury to your hand or fingers
and may damage the starter
mechanism.
WARNING
Once the engine has started,
immediately blip the throttle trigger,
which should release the starting throttle
and allow the engine to slow down to
idle.
During Operation
Holding and Controlling the Power Tool
The blower is designed for single-
handed operation with either the right or
left hand on the control handle.
Special care must be taken in slippery
conditions (wet ground, snow) and in
difficult, overgrown terrain. Watch for
hidden obstacles such as tree stumps,
roots and ditches to avoid stumbling. For
better footing, clear away fallen
branches, scrub and cuttings. Be
extremely cautious when working on
slopes or uneven ground.
WARNING
To reduce the risk of injury from loss of
control, never work on a ladder, in a tree
or any other insecure support. Never
hold the machine above shoulder
height.
Working Conditions
Operate and start your power tool only
outdoors in a well ventilated area.
Operate it under good visibility and
daylight conditions only. Work carefully.
WARNING
WARNING
Inhalation of certain dusts, especially
organic dusts such as mold or pollen,
can cause susceptible persons to have
an allergic or asthmatic reaction.
Substantial or repeated inhalation of
dust and other airborne contaminants, in
particular those with a smaller particle
size, may cause respiratory or other
illnesses. Control dust at the source
where possible. Use good work
practices, such as operating the unit so
that the wind or operating process
directs any dust raised by the power tool
away from the operator. Follow the
recommendations of EPA / OSHA /
NIOSH and occupational and trade
associations with respect to dust
("particulate matter"). When the
inhalation of dust cannot be
substantially controlled, i.e., kept at or
near the ambient (background) level, the
operator and any bystanders should
wear a respirator approved by NIOSH /
MSHA for the type of dust encountered.
WARNING
If the substance being blown is a
commercial substance, review,
understand and follow all warnings and
instructions contained in the material
safety data sheet for that substance and
/ or consult the material manufacturer /
supplier. The state of California and
some other authorities, for instance,
have published lists of substances
known to cause cancer, reproductive
toxicity, etc.
WARNING
Breathing asbestos dust is dangerous
and can cause severe or fatal injury,
respiratory illness or cancer. The use
and disposal of asbestos-containing
products have been strictly regulated by
OSHA and the Environmental Protection
Agency. If you have any reason to
As soon as the engine is
running, this product gen
-
erates toxic exhaust
fumes containing chemi
-
cals, such as unburned
hydrocarbons (including
benzene) and carbon
monoxide, that are
known to cause respira
-
tory problems, cancer,
birth defects, or other
reproductive harm. Some
of the gases (e.g. carbon
monoxide) may be color
-
less and odorless. To
reduce the risk of serious
or fatal injury / illness
from inhaling toxic fumes,
never run the machine
indoors or in poorly venti
-
lated locations.
BG 55, BG 65, BG 85, SH 55, SH 85
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7
believe that you might be blowing or
otherwise disturbing asbestos,
immediately contact your employer or a
local OSHA representative.
WARNING
Dust with silica in its composition may
contain crystalline silica. Silica is a basic
component of sand, quartz, brick, clay,
granite and numerous other minerals
and rocks, including masonry and
concrete products. Repeated and / or
substantial inhalation of airborne
crystalline silica can cause serious or
fatal respiratory disease, including
silicosis. In addition, the state of
California and some other authorities
have listed respirable crystalline silica as
a substance known to cause cancer.
When encountering such materials,
always follow the respiratory
precautions mentioned above.
Operating Instructions
WARNING
In the event of an emergency, switch off
the engine immediately – move the stop
switch to 0.
WARNING
Stop the engine immediately if you are
approached.
WARNING
To reduce the risk of personal injury, do
not direct air blast towards bystanders,
since the high pressure of the air flow
can injure eyes and can blow small
objects at great speed. Do not direct
airblast towards pets.
WARNING
The blower fan between the air intake
and output openings rotates whenever
the engine is running.
Never insert any foreign object into the
air intake of the machine or into the
nozzle of the blower. It will damage the
fan wheel and may cause serious injury
to the operator or bystanders as a result
of the object or broken parts being
thrown out at high speed.
Do not place the blower on the ground
when operating at high speed, because
small objects such as sand, grass, dust,
etc. may be pulled into the air intake and
damage the fan wheel. It is best to turn
the machine off when putting it on the
ground.
WARNING
Never modify your muffler. Any
modification could cause an increase in
heat radiation, sparks or sound level,
thereby increasing the risk of fire, burn
injury or hearing loss. You may also
permanently damage the engine. Have
your muffler serviced and repaired by
your STIHL servicing dealer only.
WARNING
The muffler and other parts of the engine
(e.g. fins of the cylinder, spark plug)
become hot during operation and remain
hot for a while after stopping the engine.
To reduce risk of burns, do not touch the
muffler and other parts while they are
hot. Keep the area around the muffler
clean. Remove excess lubricant and all
debris such as pine needles, branches
or leaves. Let the engine cool down
sitting on concrete, metal, bare ground
or solid wood away from any
combustible substances.
WARNING
An improperly mounted or damaged
cylinder housing or a
damaged/deformed muffler shell may
interfere with the cooling process of the
muffler. To reduce the risk of fire or burn
injury, do not continue work with a
damaged or improperly mounted
cylinder housing or a
damaged/deformed muffler shell.
Your muffler is furnished with a spark
arresting screen designed to reduce the
risk of fire from the emission of hot
particles. Never operate your unit with a
missing or damaged spark arresting
screen. If your gas/oil mix ratio is correct
(i.e., not too rich), this screen will
normally stay clean as a result of the
heat from the muffler and need no
service or maintenance. If you
experience loss of performance and you
suspect a clogged screen, have your
muffler maintained by a STIHL servicing
dealer. Some state or federal laws or
regulations may require a properly
maintained spark arrestor for certain
In order to reduce
the risk of personal
or even fatal injury
to bystanders from
blown objects
keep bystanders at
least 16 feet (5 m)
away when the
power tool is
running.
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8
uses. See the "Maintenance, Repair and
Storing" section of these Safety
Precautions. Remember that the risk of
a brush or forest fire is greater in hot or
dry conditions.
WARNING
Using the Vacuum Attachment
For specific assembling instructions,
see the appropriate section of your
instruction manual. Do not use this
appliance in vacuum mode without the
catcher bag.
The vacuum attachment is designed for
two-handed operation. Hold and operate
the unit with your right hand on the
control handle and your left hand on the
assist handle.
Wear the catcher bag shoulder strap
over your left shoulder – not across your
chest – so that you can quickly throw off
the unit and catcher bag in an
emergency.
WARNING
WARNING
WARNING
WARNING
Vacuuming unsuitable materials may
block the fanwheel. Switch off the unit
immediately. Then clear the blockage.
Some STIHL power tools
are equipped with a cata
-
lytic converter, which is
designed to reduce the
exhaust emissions of the
engine by a chemical
process in the muffler.
Due to this process, the
muffler does not cool
down as rapidly as con
-
ventional mufflers when
the engine returns to idle
or is shut off. To reduce
the risk of fire and burn
injuries when using a cat
-
alytic converter, always
set your power tool down
in the upright position and
never locate it where the
muffler is near dry brush,
grass, wood chips or
other combustible materi
-
als while it is still hot.
To reduce the risk
of injury, do not
operate the
machine unless it
is fully assembled
with a properly
mounted suction
tube and catcher
bag.
295BA053 KN
In order to reduce
the risk of injury
from contact with
rotating parts and
damage to the
engine, the intake
screen must
always be closed
and the locking tab
engaged when the
suction tube is not
mounted. Stop
engine and wait
until the fan is
stopped before
opening the intake
screen.
To reduce the risk of per
-
sonal injury from fire and
explosion, never attempt
to vacuum hot or burning
substances (e.g. smol
-
dering ashes, glowing
cigarettes) or combusti
-
ble fluids (e.g. gasoline,
paint thinners).
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9
WARNING
Never vacuum solid objects such as
nails, steel shavings, tacks, rocks or
broken glass. These objects may be
struck by the fan wheel and flung away
at high speed and may cause injury to
the operator or bystander.
MAINTENANCE, REPAIR AND
STORING
Maintenance, replacement, or repair of
the emission control devices and
systems may be performed by any
nonroad engine repair establishment or
individual. However, if you make a
warranty claim for a component which
has not been serviced or maintained
properly or if nonapproved replacement
parts were used, STIHL may deny
coverage.
WARNING
Use only identical STIHL replacement
parts for maintenance and repair. Use of
non-STIHL parts may cause serious or
fatal injury.
Strictly follow the maintenance and
repair instructions in the appropriate
section in this instruction manual.
Please refer to the maintenance chart in
this instruction manual.
WARNING
Always stop the engine and make sure
that the fan is stopped before doing any
maintenance or repair work or cleaning
the power tool. Do not attempt any
maintenance or repair work not
described in this instruction manual.
Have such work performed by your
STIHL servicing dealer only.
Do not clean your machine with a
pressure washer. The solid jet of water
may damage parts of the machine.
WARNING
Use the specified spark plug and make
sure it and the ignition lead are always
clean and in good condition. Always
press spark plug boot snugly onto spark
plug terminal of the proper size. (Note: If
terminal has detachable SAE adapter
nut, it must be securely attached.) A
loose connection between spark plug
terminal and the ignition wire connector
in the boot may create arcing that could
ignite combustible fumes and cause a
fire.
WARNING
Never test the ignition system with the
boot removed from the spark plug or
with a removed spark plug, since
uncontained sparking may cause a fire.
WARNING
Do not operate your power tool if the
muffler is damaged, missing or modified.
An improperly maintained muffler will
increase the risk of fire and hearing loss.
Your muffler is equipped with a spark-
arresting screen to reduce the risk of
fire; never operate your power tool if the
screen is missing, damaged or clogged.
Remember that the risk of a brush or
forest fire is greater in hot or dry
weather.
In California, it is a violation of § 4442 or
§ 4443 of the Public Resources Code to
use or operate gasoline-powered tools
on forest-covered, brush-covered or
grass-covered land unless the engine’s
exhaust system is equipped with a
complying spark arrester that is
maintained in effective working order.
The owner/operator of this product is
responsible for properly maintaining the
spark arrester. Other states or
governmental entities/agencies, such as
the U.S. Forest Service, may have
similar requirements. Contact your local
fire agency or forest service for the laws
or regulations relating to fire protection
requirements.
Tighten all nuts, bolts and screws except
the carburetor adjustment screws after
each use.
For maintenance items please also refer
to the maintenance chart in this
instruction manual.
Store the power tool in a dry and high or
locked location out of reach of children.
Before storing for longer than a few
days, always empty the fuel tank. See
chapter "Storing the machine" in this
instruction manual.
Store fuel in an approved and properly
labeled safety-type canister only. Take
care when handling gasoline! For health
and safety reasons, avoid direct contact
with the skin and avoid inhaling fuel
vapor!
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Using the Blower
Your blower is designed for one-handed
operation. It must be carried by the
control handle in the right hand.
WARNING
Operate the unit only with a properly
mounted blower tube.
The round nozzle is particularly suitable
for use on uneven surfaces (e.g. fields
and lawns).
The fan nozzle (either included with unit
or available as special accessory)
produces a broad and powerful
airstream at ground level. It can be
aimed and controlled very accurately.
This nozzle is highly effective for blow-
sweeping sawdust, leaves, grass
cuttings, etc. on paved surfaces.
Watch out for small creatures when
blow-sweeping in open areas, yards and
gardens.
In noise-sensitive areas, operate your
unit at the lowest possible engine speed.
If necessary, dampen the surface to be
cleaned in order to avoid creating too
much dust.
Using the Vacuum Shredder
Your vacuum shredder is designed for
two-handed operation. Hold and operate
the unit with your right hand on the
control handle and your left hand on the
assist handle.
Wear the catcher bag shoulder strap
over your left shoulder, not across your
chest. This enables you to quickly
remove the power tool and catcher bag
in an emergency.
WARNING
Operate the unit only with a properly
mounted suction tube and catcher bag.
NOTICE
Vacuuming abrasive material (such as
grit, stone chips, etc.) causes the blower
wheel and blower housing to wear at a
rapid rate. This results in a considerable
loss of suction power. In such a case
you should contact your dealer. STIHL
recommends a STIHL servicing dealer.
Take particular care when vacuuming
wet leaves since they may block the
blower wheel and elbow.
Watch out for small animals when
vacuuming and blow-sweeping in open
areas, yards and gardens.
Using the Unit
295BA052 KN
295BA053 KN
BG 55, BG 65, BG 85, SH 55, SH 85
English
11
To minimize blowing time, use a rake
and broom to loosen dirt particles before
you start blowing.
Recommended working technique to
minimize air pollution:
N If conditions are very dusty, dampen
surfaces slightly before blowing.
N Pull out the nozzle to full length so
that the airstream is at ground level.
N Do not blow particles in the direction
of bystanders, in particular in the
direction of children, pets, open
windows or freshly washed
vehicles. Take special care in such
situations.
N Remove the blow-swept debris in
rubbish bins – do not blow it onto the
neighbor's land.
Recommended working technique to
minimize noise:
N Operate your power tool at
reasonable times only – not early in
the morning, late at night or during
midday rest periods when people
could be disturbed. Observe local
rest periods. Normal
recommendation for professional
use on weekdays: 9:00hrs to
12:00hrs and 15:00hrs to 17:00hrs.
Be considerate of neighbors at
weekends.
N Fewer engines mean less noise.
Where possible, do not run more
than one power tool at any time.
N Operate blowers at the lowest
engine speed necessary to
accomplish the task.
N Check your blower before starting
work. Pay special attention to the
muffler, air intakes and air filter.
Save water by using a blower instead of
a water hose for lawn and garden work
wherever possible, e.g. for cleaning
yards and patios.
Mounting the Blower Tube
N Push the blower tube (1) with lug (2)
into the fan housing stub (3) and
rotate it in the direction of the arrow
to lock in position.
Working Technique Assembling the Blower
3
2
295BA003 KN
1
BG 55, BG 65, BG 85, SH 55, SH 85
English
12
N Push the nozzle (4) onto the blower
tube (1) as far as lug (5),
position (a) (long) or position (b)
(short), and rotate the nozzle in the
direction of the arrow to it lock in
position.
Removing the Blower Tube
N Use a suitable tool to lift the tab (6)
on the fan housing stub (3).
N Rotate the blower tube in the
direction of the arrow and then pull it
out.
See "Assembling the Vacuum Shredder"
for installation and removal of the
vacuum attachment.
The vacuum attachment is available as
a special accessory.
Fitting the Elbow
N From inside the catcher bag (2),
push the elbow (1) through the
intake opening and pull it outwards
until it is firmly seated.
N Attach the carrying strap.
1
5
4
295BA004 KN
a
b
6
295BA005 KN
3
Assembling the Vacuum
Shredder
1
2
295BA006 KN
BG 55, BG 65, BG 85, SH 55, SH 85
English
13
N Push the elbow (1) into the catcher
bag (2) as far as the mark and
secure it with the Velcro strip (3).
N Loosen the screw (4).
N Push the elbow (1) with lug (5) into
the fan housing stub (6) and rotate it
in the direction of the arrow to lock in
position.
N Tighten down the screw (4) firmly.
N Use a suitable tool to disengage the
tab (7) on the intake screen (8) and
then open the intake screen.
N Push guideways (9) on suction
tube (10) onto lugs (11) on fan
housing and
N rotate suction tube in direction of
arrow to lock it in position.
Removing the Elbow
N Loosen the screw (4).
3
1
2
295BA007 KN
4
295BA037 KN
5
295BA038 KN
1
6
8
7
295BA039 KN
10
11
11
11
9
9
9
295BA040 KN
4
295BA037 KN
BG 55, BG 65, BG 85, SH 55, SH 85
English
14
N Use a suitable tool to lift the tab (7)
N on the fan housing stub (6).
N Rotate the elbow in the direction of
the arrow and then pull it out.
N Tighten down the screw (4) firmly.
This engine is certified to operate on
unleaded gasoline and the STIHL two-
stroke engine oil at a mix ratio of 50:1.
Your engine requires a mixture of high-
quality gasoline and two-stroke air
cooled engine oil.
Use mid-grade unleaded gasoline with a
minimum octane rating of 89 ((R+M)/2)
and no more than 10% ethanol content.
Fuel with a lower octane rating may
increase engine temperatures. This, in
turn, increases the risk of piston seizure
and damage to the engine.
The chemical composition of the fuel is
also important. Some fuel additives not
only detrimentally affect elastomers
(carburetor diaphragms, oil seals, fuel
lines, etc.), but magnesium castings and
catalytic converters as well. This could
cause running problems or even
damage the engine. For this reason
STIHL recommends that you use only
high-quality unleaded gasoline!
Gasoline with an ethanol content of
more than 10% can cause running
problems and major damage in engines
with a manually adjustable carburetor
and should not be used in such engines.
The ethanol content in gasoline affects
engine running speed – it may be
necessary to readjust the carburetor if
you use fuels with various ethanol
contents.
WARNING
To reduce the risk of personal injury
from loss of control and/or contact with
the running cutting tool, do not use your
unit with incorrect idle adjustment. At
correct idle speed, the cutting tool
should not move.
If your power tool shows an incorrect idle
adjustment, have your STIHL dealer
check your power tool and make proper
adjustments and repairs.
The idle speed and maximum speed of
the engine change if you switch from a
fuel with a certain ethanol content to
another fuel with a much higher or lower
ethanol content.
This problem can be avoided by always
using fuel with the same ethanol
content.
Use only STIHL two-stroke engine oil or
equivalent high-quality two-stroke
engine oils that are designed for use
only in air cooled two-cycle engines.
We recommend STIHL HP Ultra 2-Cycle
Engine Oil since it is specially
formulated for use in STIHL engines.
Do not use BIA or TCW rated (two-
stroke water cooled) mix oils or other
mix oils that state they are for use in both
water cooled and air cooled engines
(e.g., outboard motors, snowmobiles,
chain saws, mopeds, etc.).
WARNING
Take care when handling gasoline.
Avoid direct contact with the skin and
avoid inhaling fuel vapor. When filling at
the pump, first remove the container
from your vehicle and place the
7
295BA041 KN
6
Fuel
BG 55, BG 65, BG 85, SH 55, SH 85
English
15
container on the ground before filling. To
reduce the risk of sparks from static
discharge and resulting fire and/or
explosion, do not fill fuel containers that
are sitting in or on a vehicle or trailer.
The container should be kept tightly
closed in order to limit the amount of
moisture that gets into the mixture.
The machine‘s fuel tank should be
cleaned as necessary.
Fuel mix ages
Only mix sufficient fuel for a few days
work, not to exceed 3 months of storage.
Store in approved fuel-containers only.
When mixing, pour oil into the container
first, and then add gasoline. Close the
container and shake it vigorously by
hand to ensure proper mixing of the oil
with the fuel.
Dispose of empty mixing-oil containers
only at authorized disposal locations.
Before fueling, clean the filler cap and
the area around it to ensure that no dirt
falls into the tank.
Always thoroughly shake the mixture in
the canister before fueling your
machine.
WARNING
In order to reduce the risk of fire and
personal injury from escaping gas vapor
and fumes, remove the fuel filler cap
carefully so as to allow any pressure
build-up in the tank to release slowly.
WARNING
After fueling, tighten fuel cap as securely
as possible by hand.
Change the fuel pick up body every year
Before storing your machine for a long
period, drain and clean the fuel tank and
run engine until carburetor is dry.
Gaso
-
line
Oil (STIHL 50:1 or equiva
-
lent high-quality oils)
US gal. US fl.oz.
12.6
2 1/2 6.4
512.8
Fueling
295BA035 KN
295BA034 KN
BG 55, BG 65, BG 85, SH 55, SH 85
English
16
Starting the Engine
N Observe safety precautions.
BG 55, 65, SH 55
N Move the stop switch (1) to the run
position I.
N Squeeze the throttle trigger (2) and
press in the lockout button (3) at the
same time.
N Release the throttle trigger.
N Release the lockout button – this is
the starting throttle position.
The lockout button can be used to lock
the throttle trigger in the full throttle
position during operation.
BG 85, SH 85
N Move the stop switch (1) to the run
position I.
N Squeeze the throttle trigger (2) and
mo ve the set ting le ver (4) to midwa y
position at the same time.
N Release the throttle trigger – this is
the starting throttle position.
The setting lever enables you to select
and hold any throttle position between
idle and full throttle. Move the setting
lever to the idle position before shutting
off the engine.
All models
Setting the choke lever
N Press the fuel pump bulb (6) at least
five times – even if the bulb is
already filled with fuel.
If the engine is cold
N Set the choke lever (5) to g.
If the engine is warm
N Set the choke lever (5) to e.
Also use this setting if the engine has
been running but is still cold.
Starting / Stopping the
Engine
3
2
1
295BA013 KN
4
1
2
295BA031 KN
6
295BA018 KN
295BA043 KN
5
BG 55, BG 65, BG 85, SH 55, SH 85
English
17
Starting
N Place the unit on the ground so that
it is secure.
N Make sure you have a firm footing:
Hold the unit firmly with your left
hand on the housing and press
down.
N Hold the starter grip with your right
hand.
N Pull the starter grip slowly until you
feel it engage and then give it a brisk
strong pull.
NOTICE
Do not pull out the starter rope all the
way – it might otherwise break.
N Do not let the starter grip snap back.
Guide it slowly back into the housing
so that the starter rope can rewind
properly.
As soon as the engine runs
BG 55, 65, SH 55
N Blip the throttle trigger so that the
lockout button pops out – the engine
settles down to idle speed.
BG 85, SH 85
N Move the setting level forwards to
end position.
Stopping the Engine
N Move the stop switch to 0.
Other hints on starting
If the engine stops during warm-up or
acceleration
N Repeat the starting pocedure – see
"If the engine is cold".
If the engine does not start
N Make sure all settings are correct
(choke shutter, throttle trigger in
starting throttke position, stop
switch to I).
N Repeat the starting procedure.
If the engine still does not start
N Move the stop switch to 0.
N Remove the spark plug – see
"Spark Plug".
N Dry the spark plug.
N Crank the engine several times with
the starter to clear the combustion
chamber.
N Refit the spark plug – see "Spark
Plug".
N Move the stop switch to I.
N Set the choke lever to e – even if
the engine is cold.
N Now start the engine.
If fuel tank has been run completely dry
and then refueled
N Press the fuel pump bulb (6) at least
five times – even if the bulb is
already filled with fuel.
N Set the choke lever according to
engine temperature.
N Start the engine.
295BA016 KN
6
295BA018 KN
BG 55, BG 65, BG 85, SH 55, SH 85
English
18
If there is a noticeable loss of engine
power
N Move the choke lever to g
N Squeeze the tabs (1) together.
N Swing the filter cover (2) open and
take it away.
N Clean away loose dirt from around
the filter.
N Take the filter (3) out of the filter
housing (4).
N Install a new filter. As a temporary
measure you can knock it out on the
palm of your hand or blow it out with
compressed air – do not wash.
Replace any damaged parts.
N Fit the filter (3) in the filter
housing (4).
N Fit the filter cover (2) so that it snaps
into position.
Exhaust emissions are controlled by the
design of the fundamental engine
parameters and components (e.g.
carburation, ignition, timing and valve or
port timing) without the addition of any
major hardware.
Cleaning the Air Filter
1
295BA019 KN
2
4
295BA046 KN
3
Engine Management
BG 55, BG 65, BG 85, SH 55, SH 85
English
19
General Information
The carburetor comes from the factory
with a standard setting.
This setting provides an optimum fuel-air
mixture under most operating
conditions.
Preparations
N Shut off the engine.
N Check the air filter and clean or
replace if necessary.
N Check the spark arresting screen
(not in all models, country-specific)
in the muffler and clean or replace if
necessary.
Different Standard Settings
Different carburetors are installed at the
factory. A different standard setting is
necessary for each of these carburetors.
Standard setting A
– High speed screw (H) = 3/4
– Low speed screw (L) = 1
Standard setting B
– High speed screw (H) = 3/4
– Low speed screw (L) = 3/4
N Determine the required standard
setting as follows: Turn the low
speed screw (L) carefully clockwise
as far as stop, then turn it
counterclockwise.
Is range of adjustment more than 1 turn?
N Continue with "Standard setting A"
Is range of adjustment less than 1 turn?
N Continue with "Standard setting B"
Standard setting A
N Turn high speed screw (H)
counterclockwise as far as stop (no
more than 3/4 turn).
N Turn the low speed screw (L)
carefully clockwise until it is against
its seat, then turn it back 1 full turn
Adjusting the Carburetor
295BA084 KN
295BA085 KN
BG 55, BG 65, BG 85, SH 55, SH 85
English
20
Standard setting B
N Turn high speed screw (H)
counterclockwise as far as stop (no
more than 3/4 turn).
N Turn the low speed screw (L)
carefully clockwise as far as stop,
then turn it back 3/4 turn.
Adjusting Idle Speed
N Carry out the standard setting.
N Start and warm up the engine.
Engine stops while idling
N Turn the idle speed screw (LA)
clockwise until the engine runs
smoothly – then back it off a 1/4 turn
from that position.
Erratic idling behavior, poor acceleration
(despite correction to setting of LA
screw).
Idle setting is too lean
N Turn the low speed screw (L)
counterclockwise, no further than
stop, until the engine runs and
accelerates smoothly.
Erratic idling behavior, engine speed
drops when swinging the machine
Idle setting is too rich
N Turn the low speed screw (L) slowly
clockwise until the engine runs and
accelerates smoothly.
It is usually necessary to change the
setting of the idle speed screw (LA) after
every correction to the low speed
screw (L).
Fine Tuning for Operation at High
Altitude
A slight correction of the setting may be
necessary if engine does not run
satisfactorily:
N Carry out the standard setting.
N Warm up the engine.
N Turn high speed screw (H) slightly
clockwise (leaner) – no further than
stop.
NOTICE
After returning from high altitude, reset
the carburetor to the standard setting.
If the setting is too lean there is a risk of
engine damage due to insufficient
lubrication and overheating.
295BA085 KN
295BA086 KN
BG 55, BG 65, BG 85, SH 55, SH 85
English
21
Power tools with a catalytic converter
(depending on model) must be run on a
50 : 1 mixture of unleaded gasoline and
STIHL two-stroke engine oil or
equivalent two-stroke engine oil – see
chapter on "Fuel".
The catayltic converter integrated in the
muffler reduces the harmful emissions in
the exhaust gas.
The correct carburetor setting (if
adjustable) and strict observance of the
prescribed mix ratio of gasoline and two-
stroke engine oil are essential to
minimize harmful emissions and ensure
a long catalytic converter service life.
If engine is down on power, difficult to
start or runs poorly at idling speed, first
check the spark plug.
Fit a new spark plug after approx. 100
operating hours or earlier if the
electrodes are badly eroded.
Wrong fuel mix (too much engine oil in
the gasoline), a dirty air filter and
unfavorable running conditions (mostly
at part throttle etc.) affect the condition
of the spark plug. These factors cause
deposits to form on the insulator nose
which may result in trouble in operation.
Removing the Spark Plug
N Pull off the spark plug boot (1).
N Unscrew the spark plug.
Checking the Spark Plug
N Clean dirty spark plug.
N Check electrode gap (A) and
readjust if necessary – see
"Specifications."
N Use only resistor type spark plugs of
the approved range.
Rectify problems that have caused
fouling of spark plug:
– too much oil in fuel mix,
– dirty air filter,
– unfavorable running conditions, e.g.
operating at part load.
Catalytic Converter Spark Plug
1
295BA083 KN
000BA039 KN
A
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